23191099 has 2 divisors, whose sum is σ = 23191100. Its totient is φ = 23191098.

The previous prime is 23191093. The next prime is 23191121. The reversal of 23191099 is 99019132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23191099 - 2¹¹ = 23189051 is a prime.

It is not a weakly prime, because it can be changed into another prime (23191093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11595549 + 11595550.

It is an arithmetic number, because the mean of its divisors is an integer number (11595550).

Almost surely, 2^23191099 is an apocalyptic number.

23191099 is a deficient number, since it is larger than the sum of its proper divisors (1).

23191099 is an equidigital number, since it uses as much as digits as its factorization.

23191099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 23191099 is about 4815.7137581048. The cubic root of 23191099 is about 285.1721500213.

The spelling of 23191099 in words is "twenty-three million, one hundred ninety-one thousand, ninety-nine".